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想象一下,我使用属性 B、C 和 D 创建了一个视图。我可以在视图中创建一个新的属性(我们称之为 A)枚举视图的每个元组吗?如果是这样,怎么做?
你在寻找这样的东西吗
CREATE VIEW vw_table1 AS SELECT rownum a , b, c, d FROM table1
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